Public power grid grid-connected coordination system for household hydrogen energy power generation and solar power generation

Abstract

The invention discloses a public power grid grid-connected coordination system for household hydrogen energy power generation and solar energy power generation, which relates to the technical field of hydrogen fuel cells, and comprises an access layer, a tuning layer and a guarantee layer, and is characterized in that the access layer is connected with a hydrogen fuel power generation heat engine through a hydrogen fuel power generation interface; the access layer is connected with a solar power generation module through a solar power generation interface, the hydrogen fuel power generation interface and the solar power generation interface are respectively connected with a dynamic load distribution controller of the tuning layer through an electric energy quality adjusting module, and the tuning layer further comprises a grid-connected inverter, a grid-connected synchronizer and a disconnection protection device. The grid-connected synchronizer is connected to a public power grid through a disconnection protection device, the guarantee layer comprises a fault protection unit, a charging settlement unit and a monitoring communication unit, and the guarantee layer is connected with a settlement system of an electric power company. According to the household power utilization system combining hydrogen energy heat and power combination and hybrid power storage, the electric power supply condition in rural areas can be effectively improved, and the reliability and quality of power supply are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cells, and in particular to a public power grid connection coordination system for household hydrogen power generation and solar power generation. Background Art

[0002] Traditional natural gas power generation boilers usually have certain limitations in terms of energy conversion rate, and their energy conversion rate is generally between 30% and 40%. This means that after burning natural gas to generate heat energy, only a relatively small amount of energy can be converted into electrical energy, while the rest of the energy is dissipated as waste heat, which is inefficient. In contrast, the energy conversion rate of the hydrogen fuel cell distributed combined heat and power system (FCMCHP) is significantly higher. Its electrochemical process based on fuel cell technology can directly convert the chemical energy in the fuel into electrical energy, avoiding the loss of a large amount of energy in the traditional combustion process. Therefore, the energy conversion rate of FCMCHP power generation is above 50%, which means that more energy is effectively converted into electrical energy.

[0003] In remote areas such as villages, the stability of power supply is often affected by the weather. Extreme weather such as storms may cause voltage instability or even power outages, causing inconvenience to people's production and life. The biogas fermentation pool environment commonly found in rural areas happens to have the energy required for FCMCHP power generation. Combining the two will provide a broader space for the application of FCMCHP. In addition to farmers' own use, the electricity generated by FCMCHP can also be connected to the public power grid for trading, and the unused energy can be used for secondary revenue to maximize energy efficiency. This involves the issue of grid connection of electricity from different sources. Summary of the invention

[0004] The purpose of the present invention is to provide a public grid connection coordination system for household hydrogen power generation and solar power generation, which can effectively improve the power supply situation in rural areas and enhance the reliability and quality of power supply.

[0005] To achieve the above-mentioned purpose, the present invention provides a public power grid connection coordination system for household hydrogen power generation and solar power generation, including an access layer, a tuning layer and a security layer. The access layer is connected to the hydrogen fuel power generation heat engine through a hydrogen fuel power generation interface, and the access layer is connected to the solar power generation module through a solar power generation interface. The hydrogen fuel power generation interface and the solar power generation interface are respectively connected to the dynamic load distribution controller of the tuning layer through a power quality regulation module. The tuning layer also includes a grid-connected inverter, a grid-connected synchronizer, and a disconnection protection device. The grid-connected synchronizer is connected to the public power grid through the disconnection protection device. The security layer includes a fault protection unit, a billing settlement unit, and a monitoring communication unit. The security layer is connected to the settlement system of the power company.

[0006] Preferably, the power quality regulation module includes a voltage stabilizer, a frequency regulator and a harmonic filter which are connected in sequence, the voltage stabilizer respectively adjusts the voltage of the hydrogen power from the hydrogen fuel power generation interface and the voltage of the solar power from the solar power generation interface, the frequency regulator adjusts the frequency of the hydrogen power and the solar power, and the harmonic filter filters the harmonic interference in the hydrogen power and the solar power.

[0007] Preferably, an MPPT tracker is provided between the solar power generation interface and the power quality regulation module, for receiving direct current from the solar panel, regulating the voltage and current of the solar power, and making the solar power generation module operate at the maximum power point.

[0008] Preferably, in the tuning layer, the dynamic load distribution controller receives all the electric energy regulated by the power quality regulation module and performs dynamic distribution; the grid-connected inverter converts the regulated direct current into alternating current; the grid-connected synchronizer synchronizes the converted alternating current with the voltage, frequency and phase of the public power grid; and the disconnect protection device disconnects when a power grid fault is detected.

[0009] Preferably, the fault protection unit includes a fault protection module and a power grid fault detection module. The fault protection module is connected to each module of the access layer and the tuning layer, and performs protection actions when a fault occurs; the power grid fault detection module is connected to the disconnect protection device, and is used to detect the voltage, frequency, system and power parameters of the power grid.

[0010] Preferably, the billing and settlement module includes a smart meter and an automatic settlement system. The smart meter is connected to the grid synchronizer to measure the amount of electricity connected to the public power grid. The automatic settlement system is connected to the power company's settlement system through a monitoring communication unit to perform electricity bill settlement and income distribution based on the amount of electricity connected to the public power grid.

[0011] Preferably, the monitoring communication unit includes a real-time monitoring system and a remote communication module. The real-time monitoring system is connected to each module of the interface layer, tuning layer and security layer to monitor the power quality, power output and grid-connected status, and transmit the monitoring data to the upper control system; the remote communication module is connected to the real-time monitoring system and the automatic settlement system to perform communication and remote transmission functions.

[0012] Therefore, the present invention adopts a public grid-connected coordination system for household hydrogen power generation and solar power generation with the above structure, which has the following beneficial effects: (1) It can coordinate the power generation and load demand of distributed energy and optimize energy distribution according to the real-time energy supply and demand. Through intelligent algorithms, it ensures that while meeting local load demand, excess electricity is efficiently transmitted to the public power grid.

[0013] (2) Adjust the grid-connected power output according to the needs of the public power grid to prevent the grid from being impacted by overload or power fluctuations.

[0014] (3) The grid-connected coordination system should have good scalability and support the access to more distributed energy sources, such as wind energy, geothermal energy, etc. Ensure that the system complies with national and regional grid access standards and is compatible with different types of grids to facilitate system deployment and operation.

[0015] (4) Self-generation and self-use, with the remaining electricity connected to the grid. Hydrogen fuel cell thermal engines can generate electricity stably, and the electricity from solar power generation modules is time-sensitive. By tuning the excess power output of both through the grid-connected tuning module, it is possible to sell excess electricity to the public power supply network, creating an additional source of income for families or communities.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an operation logic diagram of an embodiment of a public grid connection coordination system for household hydrogen power generation and solar power generation according to the present invention; Figure 2 This is a system operation logic diagram of a household cogeneration system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0019] Example like Figure 1 As shown, a public grid-connected coordination system for household hydrogen power generation and solar power generation includes an access layer, a tuning layer, and a security layer. The access layer can be provided with multiple renewable energy interfaces to support energy access of wind energy and geothermal energy.

[0020] The access layer is connected to the hydrogen fuel power generation heat engine through the hydrogen fuel power generation interface, and the access layer is connected to the solar power generation module through the solar power generation interface. The hydrogen fuel power generation interface and the solar power generation interface are respectively connected to the power quality regulation module. The power quality regulation module includes a voltage stabilizer, a frequency regulator and a harmonic filter connected in sequence. The voltage stabilizer adjusts the voltage of the hydrogen power from the hydrogen fuel power generation interface and the voltage of the solar power from the solar power generation interface respectively. The frequency regulator adjusts the frequency of the hydrogen power and the solar power. The voltage stabilizer and the frequency regulator are connected to the back end of each input source to adjust the voltage and frequency, and convert the unstable input power into a stable power output, ready for the next step of processing. The harmonic filter follows the voltage stabilizer and the frequency regulator to further purify the power, remove possible harmonic interference, and ensure the quality of the output power.

[0021] An MPPT tracker is provided between the solar power generation interface and the power quality regulation module, which is used to receive direct current from the solar panel, regulate the voltage and current of the solar power, and make the solar power generation module work at the maximum power point.

[0022] The tuning layer includes a dynamic load distribution controller, a grid-connected inverter, a grid-connected synchronizer, and a disconnection protection device, which are connected in sequence. The dynamic load distribution controller receives all electric energy regulated by the power quality regulation module, and performs reasonable dynamic distribution according to real-time demand and priority settings; the grid-connected inverter converts the regulated direct current into alternating current, ready to be connected to the public power grid; the grid-connected synchronizer synchronizes the converted alternating current with the voltage, frequency and phase of the public power grid to ensure smooth grid connection; the grid-connected synchronizer is connected to the public power grid through the disconnection protection device, and the disconnection protection device disconnects when a power grid fault is detected to protect the safety of the equipment and the public power grid.

[0023] The protection layer includes a fault protection unit, a billing settlement unit, and a monitoring communication unit. The protection layer is connected to the settlement system of the power company. The fault protection unit includes a fault protection module and a power grid fault detection module. The fault protection module is connected to each module of the access layer and the tuning layer. Once an abnormality is detected, such as overload, short circuit or overtemperature, the protection action is immediately executed to cut off the power supply of the relevant parts to ensure system safety. The power grid fault detection module is connected to the disconnect protection device to detect the voltage, frequency, system and power parameters of the power grid.

[0024] The billing and settlement module includes smart metering and automatic settlement system. The smart meter is connected to the grid-connected synchronizer to accurately record the amount of electricity connected to the public grid and provide data to the settlement system. The automatic settlement system connects with the settlement system of the power company through the monitoring communication unit to automatically settle electricity bills and distribute income according to the amount of electricity connected to the public grid.

[0025] The monitoring and communication unit includes a real-time monitoring system and a remote communication module. The real-time monitoring system is connected to each module of the interface layer, tuning layer and security layer to monitor the power quality, power output and grid-connected status, and transmit the monitoring data to the upper control system; the remote communication module is connected to the real-time monitoring system and the automatic settlement system to perform communication and remote transmission functions.

[0026] As part of household cogeneration, hydrogen fuel cell heat engines and solar power generation modules are connected to the household electricity and heating needs, and can provide stable power and heat sources for self-generating users who do not have a stable power supply environment. The following is a possible implementation method of household cogeneration, such as Figure 2As shown, the household cogeneration system includes a hydrogen energy cogeneration device, a hybrid power regulator, a solar power generation module, a public power supply network, a grid-connected tuning module, a household electrical energy load system, a household thermal energy load system and a distribution unit.

[0027] The hydrogen fuel power generation heat engine has a built-in hydrogen fuel power generation heat engine, an emergency power supply module, and a revenue power output module. The hydrogen fuel power generation heat engine has a hydrogen source input terminal, an air input terminal, a heat output terminal, and a power output terminal. The hydrogen source input terminal is used to input a hydrogen source, which can be a biogas pool with a stable output built in a village environment, or a household gas provided by a natural gas supply network, and also includes biomass fuels such as LNG, LPG, diesel, and methanol. The air input terminal is used to provide the hydrogen fuel power generation heat engine with oxygen required for the electrochemical reaction.

[0028] The heat output end is connected to the household heat load system. Most of the heat released during the electrochemical reaction of hydrogen fuel is recycled and sent to the household heat load system for daily household consumption. The household heat load system includes floor heating, greenhouses, hatcheries, silkworm houses and other production and living scenes that require heat supply to meet the daily work and life needs of residents.

[0029] The power output end of the hydrogen fuel power generation heat engine is connected to the emergency power supply module and the revenue power output module. The emergency power supply module outputs 650W DC power to the hybrid regulator, and this part of energy is finally used for household power supply; the power output module and the solar power generation module are tuned by the grid coordination system and then connected to the public grid as secondary revenue for residents. The output of the hydrogen fuel power generation heat engine is stable and continuous, and the output of the solar power generation module is affected by weather and seasons, and has high output in certain periods. Selling the surplus energy generated by both to the public power supply network can not only avoid energy waste and improve resource utilization efficiency, but also create income for residents and increase rural economic benefits. Village collectives can set up small energy service providers to provide energy services on a contract or subscription basis, thereby establishing a sustainable income model.

[0030] The solar power generation module, emergency power supply module and distribution unit are all electrically connected to the hybrid power regulator. As the tuning core of the system, the hybrid power regulator adjusts the electric energy of different power sources to the amplitude and voltage available to the battery in the household power load system, thereby storing it as an energy source in emergency situations and reducing the waste of electric energy.

[0031] The power distribution unit is electrically connected to the public power supply network and serves as the main power supply path for the home. In the event of an unexpected situation where the public power supply network is disconnected due to severe weather such as heavy rain, the power distribution unit activates the power switching function, draws stored power from the battery, and restores power to the indoor environment through the internal independent distribution board. The independent distribution board is also electrically connected to the emergency power supply module and provides electrical feedback to the emergency power supply module.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A public grid-connected coordination system for household hydrogen power generation and solar power generation, characterized by: It includes an access layer, a tuning layer and a security layer. The access layer is connected to the hydrogen fuel power generation heat engine through a hydrogen fuel power generation interface. The access layer is connected to the solar power generation module through a solar power generation interface. The hydrogen fuel power generation interface and the solar power generation interface are respectively connected to the dynamic load distribution controller of the tuning layer through a power quality regulation module. The tuning layer also includes a grid-connected inverter, a grid-connected synchronizer, and a disconnection protection device. The grid-connected synchronizer is connected to the public power grid through a disconnection protection device. The security layer includes a fault protection unit, a billing settlement unit, and a monitoring communication unit. The security layer is connected to the settlement system of the power company.

2. The public grid connection coordination system for household hydrogen power generation and solar power generation according to claim 1 is characterized by: The power quality regulation module includes a voltage stabilizer, a frequency regulator and a harmonic filter which are connected in sequence. The voltage stabilizer adjusts the voltage of the hydrogen power from the hydrogen fuel power generation interface and the voltage of the solar power from the solar power generation interface respectively. The frequency regulator adjusts the frequency of the hydrogen power and the solar power. The harmonic filter filters the harmonic interference in the hydrogen power and the solar power.

3. The public grid connection coordination system for household hydrogen power generation and solar power generation according to claim 2 is characterized by: An MPPT tracker is provided between the solar power generation interface and the power quality regulation module, which is used to receive direct current from the solar panel, regulate the voltage and current of the solar power, and make the solar power generation module work at the maximum power point.

4. The public grid connection coordination system for household hydrogen power generation and solar power generation according to claim 3 is characterized by: In the tuning layer, the dynamic load distribution controller receives all the electric energy regulated by the power quality regulation module and distributes it dynamically; the grid-connected inverter converts the regulated direct current into alternating current; the grid-connected synchronizer synchronizes the converted alternating current with the voltage, frequency and phase of the public power grid; and the disconnect protection device disconnects when a grid fault is detected.

5. The public grid connection coordination system for household hydrogen power generation and solar power generation according to claim 4 is characterized by: The fault protection unit includes a fault protection module and a power grid fault detection module. The fault protection module is connected to each module of the access layer and the tuning layer, and performs protection actions when a fault occurs; The power grid fault detection module is connected to the disconnect protection device and is used to detect the voltage, frequency, system and power parameters of the power grid.

6. The public grid connection coordination system for household hydrogen power generation and solar power generation according to claim 5 is characterized by: The billing and settlement module includes an intelligent meter and an automatic settlement system. The intelligent meter is connected to the grid synchronizer to measure the amount of electricity connected to the public power grid. The automatic settlement system is connected to the settlement system of the power company through a monitoring communication unit to settle electricity charges and distribute income based on the amount of electricity connected to the public power grid.

7. The public grid connection coordination system for household hydrogen power generation and solar power generation according to claim 6 is characterized by: The monitoring and communication unit includes a real-time monitoring system and a remote communication module. The real-time monitoring system is connected to each module of the interface layer, tuning layer and security layer to monitor the power quality, power output and grid-connected status, and transmit the monitoring data to the upper control system; the remote communication module is connected to the real-time monitoring system and the automatic settlement system to perform communication and remote transmission functions.

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